Bumping, in general, is frowned upon. The reason why is that the forum is for people to discuss what they want. If you’re bumping something, then it means that for whatever reason you’re trying to get people to talk about something that they have no interest in talking about. It’s like if you go to a party where everyone is talking about art and music and you start shouting about sports and trying to make people talk about sports. It’s just rude.

But there are exceptions, so I’ll generally let a single bump of a particular topic slide so long as it is used extremely sparingly.

jeancroy:

The best bump reply are those that don’t looks like a bump. Eg you found a new information to contribute.